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 A345054 Odd numbers k such that A173557(k) divides nonzero A051709(k). 2
 27, 243, 1377, 2187, 3125, 19683, 28125, 55233, 68445, 177147, 195625, 203125, 239805, 253125, 453125, 823543, 907137, 1323297, 1378125, 1464561, 1594323, 1953125, 2278125, 3341637, 3572829, 5255361, 5877117, 9034497, 9819837, 11701053, 14348907, 17453125, 19460393, 20503125, 22209633, 26010621, 30074733, 44910045 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Question: Are there any common terms with A345051? LINKS PROG (PARI) A051709(n) = ((sigma(n) + eulerphi(n)) - (2*n)); A173557(n) = factorback(apply(p -> p-1, factor(n)[, 1])); isA345054(n) = if(!(n%2), 0, my(u=A051709(n)); ((u>0)&&(0==(u%A173557(n))))); CROSSREFS Odd terms in A344994. Cf. A051709, A173557, A345051. Sequence in context: A183806 A207104 A075548 * A074117 A030509 A042414 Adjacent sequences: A345051 A345052 A345053 * A345055 A345056 A345057 KEYWORD nonn AUTHOR Antti Karttunen, Jun 06 2021 STATUS approved

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Last modified December 8 16:54 EST 2022. Contains 358698 sequences. (Running on oeis4.)